Lock.



A. LAWRENGE.

LOCK.

PPLIOATION FILED JULY 27, 1907.

' 963,591. Patented July 5,1910.

\ [NVENTOR l I Atamey UNITED srArnsrATnNT orricn.

ALFRED LAWRENCE, F STATKFORD, CONNECTICUT, ASSIGNOR T0 THE YALE t TGV/TN MANUFACTURING COIPANY, OF STAlVIFORD, CCNNECTICUT.

LOCK.

To all whom it may concern:

Be it known that l, ALFRED LAWRENCE, ot Stamford, in the county ot Fairfield and State ot Connecticut, have invented certain new and useful Improvements in Locks; and l do hereby declare the following to be a full, clear, and exact description ot the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in locks, and particularly to that class ot locks wherein stop work mechanisn'i is employed tor deadlocking the outer knob, the objert ot the invention being to provide ine-ans tor deadlockinpl the stop work mechanism, whereby when the door is closed, the stop work cannot be manipulated by an instrument inserted between the door traine and the tace plate ot the lock.

`With this object in view my invention consists in two connected sliding levers operable through the tace plate ot the lock, the inner end ot one lever adapted to enter a slot in the roll back ot the outer knob, and a deadlocking lever operated by the sliding movement ot' the dead bolt, adapted to engage said stop work mechanism and prevent any movement thereof when the dead bolt is retracted.

lily invention turther consists in the parts and coml.;-i1mtions ot parts as will be more fully described and pointed out in the claims.

ln the accompanying drawings, Figure l is a view in elevation ot my improved lock, showing the stop work disengaged trom the roll back ot the outer knob. Fig. Q is a similar view showing the stop work (logging the 1"all bark tor the outer knob, and is view ot the stop work mechanism, roll l acks, stop work clogging lever and bolt snowing' the means on the latter tor actuating the clogging lever.

1 represents the lock case, 2 the roll back tor outer knob and 3 the roll back for the inner knob. Y

The knob spindles ot the two knobs havel independent rotary motion, and eacri engages its respective roll back, hence a turning movement ot either knob operates to turn its respective roll back, Both roll backs engage the actuating lever el, the toe 5 ot which rests in front ot and in contact with the cross head 6 on the stem ot latch Specification of Letters Patent.

Application led July 27', 1907.

Patented July 5, 1910.

Serial No. 385,822.

bolt T. The latch bolt normally held in its forward or projected position by the spring- 8 and the lever l is held in its normal position by the spring 9.

10 and 11 are the stop work plungers suitably mounted within the casing, and in the present instance, on opposite sides of the latch bolt. T he outer ends of these plunge rs project through the tace plate l2 ot the lock, so as to be actuated from the outside when the door is open. The rear end ot" plunger 10 when in its inner position, is adapted to enter slot 13 in the roll back ot the outer knob, and as the plunger is supported against any lateral movement, it will be seen that when in such position, the outer knob will be deadlocked, thus preventing the latch bolt from beingl retracted by the outer knob. The plungers 10 and 11 are connected by the rocking lever 14, the ends ot which rest in slots in the sides ot the plungers. This lever 11i is centrally pivoted to the lock "ase, so that when one plunger is pushed in the other will be forced out. lt has been Jfound that stop work mechanism of this type, may be manipulated by a bent wire inserted in the space between the door trame and face plate ot the lock, in a position to engage plunger l1, and by turning the wire push in plunger 1l, thus forcing` out plunger lO and disconnecting it trom the roll back, which ot' course leaves the door free to be opened by the outer knob, 1n order to prevent such manipulation ot the lock l have provided the lever 15 pivoted to the lock case and having a lip 16 adapted to engage either the 'front or rear side ot shoulder 17 on plunger 11 and lock the latter and also the plunger 10 against movement. This lever 15, in the present instance, bellcrank in shape, with one arm thereof resting behind and in the path of movement ot the lug 18 on the dead bolt 19, so that when the dead bolt is in its unlocked or retracted position, the lug 1S on the dead bolt will be in contact with the arm of lever 15, and hold the lip ot the latter in contactl with the shoulder 17. It the stop work be in a position to dead lock the outer knob, the lip 16 on lever 15 will rest in rear or" shoulderl 17 on plunger 11 and thus prevent the latter from being forced in, whereas if the stop work plunger 10 be out so as to release the outer knob, the lip will enoage the front of shoulder and thus prevent plunger 10 from being forced in. Vhen the dead bolt is moving to its locking or projected position the lug 18 thereon will be moved away from bell crank lever 15, while the end of rib 2O will engage said lever l5 and turn the latter to a position out of engagement with shoulder 1T on plunger l1, hence in order to manipulate the stop mechanism it is irst necessary to open the door so as to render the ends of the plungers accessible. After the door has been opened t-he dead bolt should be thrown to its locking or projected position, which movement clisengages the cleacllocking bell crank lever from the plunger ll thus leaving the plungers free to be moved. After the plungers have been adjusted so as to either deadlock or release the outer knob, as desired, the retractioi'i ot the dead bolt locks the parts against further adjustment, h-ence in order to reacljust the. stop work mechanism the dead bolt must be moved to its locking position when the door is open.

In the drawings I have shown a dead bolt constructed to be operated by a cylinder or pin tumbler lock, but this is not essential, as my invention contemplates the use of a sliding bolt of any kind for releasing t-he stop work deacllocking mechanism.

It is evident that many slight changes might be resorted to in the relative arrange'- ment of parts shown and described without departing from the spirit and scope of my invention hence l would have it understood that l do not wish to confine myself to the exact construction of parts shown and described, but,

Having fully described my invention what l claim as new and desire to secure by Letters-Patent, isz-- l. In a lock the combination with a latch bolt and knob mechanism 'lor retracting same, of a slide for cleacllocking the outer knob, a dead bolt and means controlled by the movement of the dead bolt for deadlocking the slide.

2. In a lock the combination with a latch bolt, and knob mechanism for retracting same, of a slide for cleadlocking the outer knob, one end of said slide projecting through the face plate of the lock whereby the slide may be moved longitudinally, a dead bolt, and means cont-rolled by the movement of the dead bolt for deacllocking the slide.

3. In a lock, the combination with a bolt and knob mechanism for retracting same, of a manually operable slide accessible through the outer face of the lock for dead locking the outer knob, a dead bolt and means controlled by the movement of the dead bolt for deadlocking the slide.

4l. In a lock, a dead bolt, a latch bolt, in-

dependent-ly operable inner and outer roll backs, means of connection between said roll backs and latch bolt, stop work mechanism for clogging one of said roll backs, and means controlled by the movements of the dead bolt for cleadlocking said stop work mechanism.

5. In a lock and latch mechanism, a bolt, a roll back adapted to be operated by a knob and spindle, means of connection between said roll back and bolt, stop work plunger mechanism, accessible through the face plate of the lock for clogging the operation of said bolt by said roll back and key actuated means for preventing the operation of said clogging mechanism.

6. In a lock and latch mechanism, a bolt, a means for retracting said bolt, stop work plunger mechanism accessible through the face of the lock for clogging said retracting means, and key actuated means for locking said clogging device against movement.

7. ln a lock the combination with a latch bolt and knob mechanism for retracting same, of a stop work mechanism for dogging the operation of said bolt by said knob mechanism, a key actuated bolt and dogging means for the stop work mechanism actuated by the movement of the key actuated bolt.

8. [n a mortise lock the combination with a bolt, and knob mechanism for retracting same, of stop work mechanism operable i through the face plate of the lock for dogging the outer knob, and means manually operable through the side of the lock for deadlocking the night latch mechanism.

9. In a mortise lock, the combination with a face plate a bolt, and knob mechanism for actuating same, of stop work mechanism operable through the face plate of the lock for clogging the outer knob, and key actuated means operable through the side of the lock for deadlocking said night latch mechanism. I

l0. In a mortise lock the combination with a latch bolt, knob mechanism for retracting same and a dead bolt, of stop work mechanism for clogging the outer knob, and means for clogging said stop work mechanism, the said stop work clogging means being always released from said stop work when the dead bolt is projected and always clogging same when the dead bolt is retracted.

In testimony whereof, I have signed this specilication in the presence of two subscribing witnesses.

ALFRED LAVVR'ENCE.

Witnesses:

l/VARREN H. TAYLOR, CHARLES E. VAIL. 

